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+/*
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+ * This contain platform specific code for APM PPC460EX based Canyonlands
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+ * board.
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+ *
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+ * Copyright (c) 2010, Applied Micro Circuits Corporation
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+ * Author: Rupjyoti Sarmah <rsarmah@apm.com>
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation; either version 2 of
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+ * the License, or (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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+ * MA 02111-1307 USA
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+ *
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+ */
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+#include <linux/kernel.h>
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+#include <linux/init.h>
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+#include <asm/pci-bridge.h>
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+#include <asm/ppc4xx.h>
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+#include <asm/udbg.h>
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+#include <asm/uic.h>
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+#include <linux/of_platform.h>
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+#include <linux/delay.h>
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+#include "44x.h"
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+
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+#define BCSR_USB_EN 0x11
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+
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+static __initdata struct of_device_id ppc460ex_of_bus[] = {
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+ { .compatible = "ibm,plb4", },
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+ { .compatible = "ibm,opb", },
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+ { .compatible = "ibm,ebc", },
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+ { .compatible = "simple-bus", },
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+ {},
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+};
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+
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+static int __init ppc460ex_device_probe(void)
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+{
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+ of_platform_bus_probe(NULL, ppc460ex_of_bus, NULL);
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+
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+ return 0;
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+}
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+machine_device_initcall(canyonlands, ppc460ex_device_probe);
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+
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+/* Using this code only for the Canyonlands board. */
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+
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+static int __init ppc460ex_probe(void)
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+{
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+ unsigned long root = of_get_flat_dt_root();
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+ if (of_flat_dt_is_compatible(root, "amcc,canyonlands")) {
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+ ppc_pci_set_flags(PPC_PCI_REASSIGN_ALL_RSRC);
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+ return 1;
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+ }
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+ return 0;
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+}
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+
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+/* USB PHY fixup code on Canyonlands kit. */
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+
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+static int __init ppc460ex_canyonlands_fixup(void)
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+{
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+ u8 __iomem *bcsr ;
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+ void __iomem *vaddr;
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+ struct device_node *np;
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+ int ret = 0;
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+
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+ np = of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-bcsr");
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+ if (!np) {
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+ printk(KERN_ERR "failed did not find amcc, ppc460ex bcsr node\n");
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+ return -ENODEV;
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+ }
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+
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+ bcsr = of_iomap(np, 0);
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+ of_node_put(np);
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+
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+ if (!bcsr) {
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+ printk(KERN_CRIT "Could not remap bcsr\n");
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+ ret = -ENODEV;
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+ goto err_bcsr;
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+ }
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+
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+ np = of_find_compatible_node(NULL, NULL, "ibm,ppc4xx-gpio");
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+ if (!np) {
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+ printk(KERN_ERR "failed did not find ibm,ppc4xx-gpio node\n");
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+ return -ENODEV;
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+ }
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+
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+ vaddr = of_iomap(np, 0);
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+ of_node_put(np);
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+
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+ if (!vaddr) {
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+ printk(KERN_CRIT "Could not get gpio node address\n");
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+ ret = -ENODEV;
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+ goto err_gpio;
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+ }
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+ /* Disable USB, through the BCSR7 bits */
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+ setbits8(&bcsr[7], BCSR_USB_EN);
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+
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+ /* Wait for a while after reset */
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+ msleep(100);
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+
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+ /* Enable USB here */
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+ clrbits8(&bcsr[7], BCSR_USB_EN);
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+
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+ /*
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+ * Configure multiplexed gpio16 and gpio19 as alternate1 output
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+ * source after USB reset. In this configuration gpio16 will be
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+ * USB2HStop and gpio19 will be USB2DStop. For more details refer to
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+ * table 34-7 of PPC460EX user manual.
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+ */
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+ setbits32((vaddr + GPIO0_OSRH), 0x42000000);
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+ setbits32((vaddr + GPIO0_TSRH), 0x42000000);
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+err_gpio:
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+ iounmap(vaddr);
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+err_bcsr:
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+ iounmap(bcsr);
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+ return ret;
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+}
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+machine_device_initcall(canyonlands, ppc460ex_canyonlands_fixup);
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+define_machine(canyonlands) {
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+ .name = "Canyonlands",
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+ .probe = ppc460ex_probe,
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+ .progress = udbg_progress,
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+ .init_IRQ = uic_init_tree,
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+ .get_irq = uic_get_irq,
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+ .restart = ppc4xx_reset_system,
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+ .calibrate_decr = generic_calibrate_decr,
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+};
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Benjamin Herrenschmidt